Adjusting device for fan blades



Oct; 23,1928. 1,689,083

E. C. RINGEL ADJUSTING DEVICE FOR FAN BLADES Filed April 9, 192'! 2 Sheets-Sheet 1 gwventoz 5 9 W wEafi Oct. 23, 1928. 389,083

- E. C. RINGEL ADJUSTING DEVICE FOR FAN BLADES Filed April 9, 192'? 2' Shoots-Shee t I l I I F I Zlwwmtoo Patented ca. 23, 1928.

ELMER C. R INGEL, OF ALMA, KANSAS.

A'rsr rice.

ADJUSTING DEVICE FOR FAN BLADES.

Application filed April 9,

The invention relates to fans, particularly of the overhead type, and has for its object the provision of an improved means for adjusting the pitch of the blades so that the air may be agitated at a distance from the fan or closer thereto and and directly under the fan as may be desired.

A further object of the invention is the provision of means for adjusting the blades by which all of the blades are simultaneously adjusted, the means being adapted to be operated while the fan is in operation.

A further object of the invention is the provision of a manually actuated means for simultaneously adjusting the pitch of the blades.

The invention will be described in detail hereinafter and will be found illustrated in the accompanying drawings in which Figure 1 is a top plan view of a fan constructed in accordance with the invention,

Figure 2 is a transverse sectional view on a plane indicated by the line 22 of Figure 1,

Figures 3 and 4 are horizontal sectional views on planes indicated by the line 3-3, and i 1, respectively, of Figure 2, and

Figure 5 is an edge view of one of the fan blades.

In the drawings similar reference characters will be used to designate corresponding parts throughout the several views.

The fan includes a casing made up of three sections designated 1, 2, and 3, respectively, section 1 being provided with a tubular boss 1 in which is secured the operating shaft 5 that is adapted to be actuated by any type of motor. Sections 1, 2, and 3 are secured together by means of screws 6 secured in openings 7 in the three sections 1, 2, and 3, the openings 7 in section 1 being threaded to engage the threaded ends of screws 6. Sections 1 and 2 are provided with mating inwardly extended bearing members 8 and 9 in which are journaled tubular shafts 10 hav- 1927. Serial No, 182 364.

ing their outer ends extending outside the wall of thecasing on which are adapted to be secured sockets 11 on the fan blades 12. Tubular shafts 10 are provided with worm gears 13 that mesh with worms 14 on shafts 15, journaled in bosses 16 in sections 1 and 2, said shafts 15 extending through the lower wall of section 2 and are secured to gear wheels 17 that are in mesh with a gear wheel 18 secured to a manually operated adjusting shaft 19 that extends through the lower wall of the section 3. Section 3 is recessed as shown at 20 to receive the gear wheels 17 and 18.

It will be understood that by rotating the shaft 19 engagement of the gear Wheel 18 with the gear wheels 17 will rotate the shafts 15 and the worm gear 14 thereon by being in mesh with the worm gears 13 on the tubular shafts 10 will rotate said shaft to adjust the pitch of the blades 12 for operation of the fan as desired, that is to agitate the air at a dlstance from or close to or directly under the fan casing.

What is claimed is An adjustable device for fan blades, comprising a casing formed of a plurality of sections, two of said sections having mating recesses forming a chamber when the casing ,is assembled, fan blade supports journaled insaid two sections, worm wheels secured to said supports, worm shafts journaled in said two sections and meshing with said worm wheels, the other section of said casing having a recess, the shafts aforesaid having one of their ends extended into said recess, pinions secured to the extended ends of said shafts, another shaft journaled in said other ELMER C. RINGEL. 

